RAD components: Telerik, Asp.net zero
Libraries: EPPlus, SyncFusion PDF
Editors: VS enterprise, JetBrains Rider
DB: Sql Server OS: Windows, Windows Server
MS products for biz: Azure DevOps, Teams, Office Suite
misc Windows tools: Listary, Directory Opus, Chocolatey, PowerGrep
all stuff that makes the dev experience very comfortable
Are Windows Server, SQL Server, Azure DevOps, Teams, Chocolatey, and PowerGrep really a better dev experience than Linux, Postgres, Github, Slack, apt, and actual grep?
Many are debatable, but SQL Server & Windows Server are honestly a huge pain to deal with, and on top of that cost a boatload in licensing fees. Even Microsoft has decided Azure devops is a waste of time post github acquisition and it is apparently eventually going away. Teams honestly sucks in comparison to Slack.
Visual Studio or JetBrains rider is the only thing a professional developer needs. Which is tiny investment for a professional. The rest of the products I have not seen in new projects use for years.
I'd say Visual Studio (not VSCode) is pretty much the only not-really-optional, not-really-free dependency. I suppose that means you also need to buy Windows.
Personally, while I use(d) C# for work and I think it comes with a solid toolchain and I have no big complaints, I have never chosen it when I could choose the stack from the beginning.